does my Rott need to be "married"

i dont know if "married" is appropriate here, but i feel i expresses well what i need to say. pls excuse my poor english my Rottweiler (Rolf) is 2.5 years old, he never got married. is this a problem? can he spend his whole life without it? does it affect his psychological health (depression, aggression,..)? does he have to be neutred at a certain age?

In my opinion, all dogs need to be spayed/neutered unless they are planned to be bred by serious breeders.

The fact that your dog bit you can be partially due to him not being neutered at the age of 2.5 yrs old. As kjd mentioned neutering can prevent some diseases/problems later on. In addition to the health problems, it can mellow your dog down and it will be easier to handle/control him.

It is a personal choice but I wish, as a dog foster, that there will be no more puppies born by accident to be euthanized.

do u think that neutring is harmless to the dog, does it have any side effects like being lazy or fat, ... whatever? honestly i feel bad about changing how the dog was naturaly created. i dont know. maybe i am wrong. as for the bite , its curing now. but i think it was an early alarm that something is wrong. so it wasnt that bad after all

Dogs, like people, become fat from being overfed and/or underexercised. I had a male dog, neutered sometime between 3 and 5 years old. He never got fat. In his last year, he slowed down, only because he had degenerative myelopathy and couldn't work his hind legs well. All my females have been spayed. None of them were ever fat. Nor were any of them ever lazy. (I especially watched the weight because extra weight can be hard on the joints) You should watch the weight of your Rottie.

The only exercise your Rottie will miss will be chasing after females in heat. He will also miss out on the car that hit him because he was after that female in heat. And the female dog's owner's hose (or worse) that is turned on him because he isn't the mate they want for their dog!

All of my dogs are spayed/neutered but none of them is or was (for the ones that are no longer living) overweight.

As kjd said dogs get fat because they are overfed (especially with people's food - you see so many obese people in the U.S.) and/or underexcicised, not because of getting spayed/neutered.

This is not a side effect but I have to mention that there is always a risk of anesthesia for a surgery.

I think guys feel more sorry about their own male dogs getting neutered. However, I would be rather sorry for the dogs that can never mate while having such natural desire. I think it would be more stressful for both dogs and the owners to keep the dogs intact.

Also, dog registration fee is significantly lower when your dog is spayed/neutered in the U.S.